But before one reaches a higher state of consciousness, there is a stage where one can develop in oneself the faculty of reason a clear, precise, logical reason, sufficiently objective in its vision of things. And when one has developed this reason—well, all impulses, feelings, desires, all disturbances can be put in the presence of this reason and that makes you reasonable. Most people, when something troubles them, become very unreasonable. When, for example, they are ill, they pass their time saying, “Oh, how ill I am, how frightful it is; is it going to last like that all the time?” And naturally it gets worse and worse. Or when some misfortune befalls them, they cry out: “It is only to me that these things happen and I was thinking that everything was fine before”, and they burst into a fit of tears, a fit of nerves. Well, not to speak of superman, in man himself there is a higher capacity called reason, which is able to look at things calmly, coolly, reasonably. And this reason tells you, “Don’t worry, that will improve nothing, you must not grumble, you must accept the thing since it has come.” Then you immediately become calm. It is a very good mental training, it develops judgment, vision, objectivity and at the same time it has a very healthy action upon your character. It helps you to avoid the ridiculousness of giving way to your nerves and lets you behave like a reasonable person.
Ref : Questions and Answers 1950-1951